Iron with Cofactors Dietary Supplement Blood Builder Ferrasorb provides 36 mg of elemental iron per capsule, plus the active forms of folate and vitamins B6 and B12, which are essential for blood-building. Vitamin C optimizes iron absorption. Iron deficiency can manifest as weakness, fatigue, shortness of breath on exertion, dizziness, tinnitus, spots before the eyes, drowsiness, irritability, infrequent
